Open AccessThermoelectric Properties of Bi2Sr2CO2Oy/Cu2Se Composites
Author(s) -
Erying Li,
Congbin Liu,
Hang Song
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/585/1/012043
Subject(s) - seebeck coefficient , materials science , thermoelectric effect , electrical resistivity and conductivity , dimensionless quantity , thermal conductivity , analytical chemistry (journal) , hydrothermal circulation , doping , composite material , mineralogy , chemistry , chemical engineering , thermodynamics , physics , optoelectronics , chromatography , engineering , quantum mechanics
The Cu 2 Se nanopowder was fabricated by the hydrothermal synthesis, then the thermoelectric properties of Bi 2 Sr 2 Co 2 O y + x wt% Cu 2 Se (x = 0.0, 0.25, 0.50, 0.75, 1.00, and 1.25) composites prepared by the solid state method were investigated from room temperature to 875 K. The Cu 2 Se dispersant with an appropriate amount played a significant role in decreasing resistivity. Although the Seebeck coefficients also decreased slightly, the power factors of the doped samples got significant improvement. Furthermore, the thermal conductivity was depressed apparently. Ultimately, the Bi 2 Sr 2 Co 2 O y + 0.5 wt% Cu 2 Se sample showed a better dimensionless figure of merit ( ZT ) value of 0.14 at 875 K. Compared with the pure Bi 2 Sr 2 Co 2 O y sample, it was improved about by 25.5%.